The "Red Riding Hood" star, who split with Ryan Phillippe for good in early June, showed off her shorter new hairstyle at LAX Airport on Friday. Grinning from ear to ear, the 25-year-old actress -- who once told InStyle she would chop off her hair only "for a movie" role -- showed no signs of heartbreak upon her arrival.

After all, her breakup with 36-year-old Phillippe was mutual. "They were never fully committed," a source told Us Weekly. "They were always on and off."

"There's no bad blood," the source added. "They're cool."

Seyfried split with "Mamma Mia!" co-star Dominic Cooper in May 2010, following a three-year relationship with musician Jesse Marchant. The actress also previously has been linked to costars Micah Alberti ("All My Children") and Emile Hirsch ("Alpha Dog").